package com.zhu.common;

import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;

public class TokenCache {
    private static Logger logger= LoggerFactory.getLogger(TokenCache.class);

    public static final String TOKEN_PREFIX="token_";

    //LRU算法
    private static LoadingCache<String, String> localCache= CacheBuilder.newBuilder().initialCapacity(1000).maximumSize(10000).expireAfterAccess(12, TimeUnit.HOURS)
    .build(new CacheLoader<String,String>() {
        @Override
        public String load(String s) throws Exception {
            return "null";
        }
    });

    public static void setKey(String key,String value){
        localCache.put(key,value);
    }

    public static String getKey(String key){
        String value=null;
        try {
            value = localCache.get(key);
            if("null".equals(value)) {
                return null;
            }
            return value;
        } catch (ExecutionException e) {
            logger.error("localCache get error",e);
        }
        return  null;
    }

}
